History

In 1977, the state was split into two halves, with Mato Grosso do Sul becoming a new state. The Bororo Indians live in the Mato Grosso area. As late as 1880, soldiers patrolled lands on the outskirts of Cuiabá, Mato Grosso's capital and largest city, to protect settlers from Bororo raids.

The historic remoteness of this area led it to be the subject of exploration, most notably by Captain Percy Fawcett, in the quest for lost cities. It was also the rumored location of access to the interior of the earth in various Hollow Earth theories.